Thamyris, Arrogant Muscian

Cascade (When you cast this spell, exile cards from
the top of your library until you exile a nonland card that costs less. You may cast it without paying its
mana cost. Put the exiled cards on the bottom in a random order.)

When Thamyris, Arrogant Muscian enters, it deals damage equal to the number of spells you've cast this turn to any target.